#ifndef __COMM_HPP__
#define __COMM_HPP__

#include<iostream>
#include<string>
#include<cerrno>
#include<cstring>
#include<sys/types.h>
#include<sys/stat.h>
#include<unistd.h>
#include<fcntl.h>
#include<cassert>
using namespace std;

#define Mode 0666
#define Path "./fifo"

class Fifo
{
  public:
  Fifo(const string &path = Path)
  :_path(path)
  {
    umask(0);
    int n = mkfifo(_path.c_str(),Mode);
    if(n==0)
    {
        cout<<"mkfifo success"<<endl;
    }
    else
    {
        cerr<<"mkfifo failed,errno:"<<errno<<",errstring: "<<strerror(errno)<<endl;
    }
  }
~Fifo()
{
    int n = unlink(_path.c_str());
    if(n==0)
    {
        cout<<"remove fifo file"<<_path<<"success"<<endl;
    }
    else
    {
        cerr<<"remove failed,errno: "<<errno<<",errstring: "<<strerror(errno)<<endl;
    }
}
  private:
    string _path;//文件路径+文件名
};
class Sync
{
    public:
    Sync()
    :rfd(-1)
    ,wfd(-1)
    {}
    void OpenReadOrDie()
    {
        rfd = open(Path,O_WRONLY);
        if(rfd<0)
        {
            exit(1);
        }
    }
    bool Wait()
    {
        bool ret = true;
        uint32_t c = 0;
        ssize_t n = read(rfd,&c,sizeof(uint32_t));
        if(n==sizeof(uint32_t))
        {
            std::cout<<"server wakeup,begb read shm..."<<std::endl;
        }
        else if(n==0)
        {
            ret == false;
        }
        else
        {
            return false;
        }
        return ret;
    }
    void Wakeup()
    {
        uint32_t c = 0;
        ssize_t n = write(wfd,&c,sizeof(c));
        assert(n==sizeof(uint32_t));
        std::cout<<"wakeup server..."<<std::endl;
    }
    ~Sync()
    {}
    private:
    int rfd;
    int wfd;
};
#endif